REMANUFACTURED TBMS

New tbms do not offer significantly better performance characteristics than those produced up to 10 years ago and it is possible for these machines to be up-rated quite cheaply. Tbms can now be modified to provide a more universal application to a range of geological situations. It is suggested that narrow spacing of disc cutters on the cutterhead is most economic and that an increase in head speed, though not always possible, will increase the rate of penetration. Soft start variable voltage control systems will lower electricity costs and stabilisation of the cutterhead will reduce cutter wear. Details of other modifications described include shields used in difficult shales, spacing of the propel rams to increase clearance between the rams and machine, the revision of seals and the use of grill bars. Maintenance time has been found to be no greater with older machines than with new. The haulage of muck can be a major cause of delays and the advantages are listed of an endless belt conveyance system. It is suggested that a new generation of tbms is required. (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/09568700
• Corporate Authors:

  Mining Journal Limited

  60 Worship Street
  London EC2A 2HD,   England 
• Authors:
  • Peach, A J
• Publication Date: 1988-6

Media Info

• Features: References;
• Pagination: p. 155-157
• Serial:
  • WORLD TUNNELLING
  • Volume: 1
  • Issue Number: 2
  • Publisher: THE MINING JOURNAL LTD
  • ISSN: 0956-8700

Subject/Index Terms

• TRT Terms: Costs; Design; Geology; Improvements; Maintenance; Mucking; Tunnel borers
• ITRD Terms: 224: Cost; 9011: Design (overall design); 3383: Full face tunnelling machine; 4053: Geology; 9108: Improvement; 3847: Maintenance; 5126: Spoil removal (tunnel)
• Subject Areas: Bridges and other structures; Design; Finance; Geotechnology; Highways; Maintenance and Preservation;

Filing Info

• Accession Number: 00493190
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: May 31 1990 12:00AM